161+ Calculators

Math Calculators

Free online math calculators for algebra, geometry, statistics, and more. Step-by-step solutions for students, educators, and professionals.

22

Math Tools

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Core Math

Scientific Calculator

Full-function scientific calculator with trig, logs, powers, and memory functions.

Algebra Calculator

Solve linear equations, quadratics, and systems of equations step by step.

Graphing Calculator

Plot functions, find intersections, and visualize equations on a coordinate plane.

Percentage Calculator

Calculate percentages, percentage change, and what percent one number is of another.

Percentage Change Calculator

Find the percent increase or decrease between two values with step-by-step work.

Square Root Calculator

Calculate square roots, cube roots, and nth roots with full decimal precision.

Exponent Calculator

Raise any base to any power — positive, negative, or fractional exponents.

Ratio Calculator

Simplify ratios, find equivalent ratios, and solve proportion problems.

Random Number Generator

Generate random numbers within any range — integers, decimals, or unique sets.

Fractions & Conversions

Fraction Calculator

Add, subtract, multiply, and divide fractions with automatically simplified results.

Simplify Fractions Calculator

Reduce any fraction to its simplest form with full step-by-step work shown.

Roman Numeral Converter

Convert between Roman numerals and standard numbers in both directions instantly.

Speed Distance Time Calculator

Solve for speed, distance, or time given any two values. Works in any units.

Geometry

Triangle Calculator

Solve any triangle — find missing sides, angles, area, and perimeter from any inputs.

Pythagorean Theorem CalculatorNew

Find the hypotenuse or any missing side of a right triangle using a² + b² = c².

Logarithms & Advanced Math

Log CalculatorNew

Calculate logarithms for any base — log₁₀, natural log, log₂, and custom bases.

Significant Figures CalculatorNew

Count sig figs, round to significant figures, and apply arithmetic sig fig rules.

Statistics

Standard Deviation Calculator

Calculate mean, variance, and standard deviation for any data set instantly.

P-value CalculatorNew

Calculate p-values for z-tests, t-tests, and chi-square hypothesis tests.

Confidence Interval CalculatorNew

Calculate confidence intervals for means and proportions. Includes sample size calculator.

Grades & Academic

Calculate your GPA from grades and credit hours for any semester or cumulative total.

Grade Calculator

Find the grade you need on a final exam to hit your target course grade.